package com.itheima.test.test1;

import java.util.HashMap;

public class Demo1 {
    public static void main(String[] args) {
        HashMap<Student,String> map = new HashMap<>();
        Student s1 = new Student ("张三",23);
        Student s2 = new Student ("张三",23);
        map.put(s1,"南京");
        map.put(s2,"南京");
        System.out.println(map);
    }
}
class Student {
    private String name;
    private int age;
    public Student (){}
    public Student (String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", age=" + age +
                '}';
    }
}